The CHINT NJR2-D Soft-Starter provides intelligent, smooth control of three-phase AC induction motors using advanced dual-CPU digital control technology. It enables precise soft starting and stopping, reducing mechanical stress and electrical surges. Designed for durability and versatility, it includes multiple start modes, RS485 communication, and comprehensive protection features, making it ideal for industrial machinery, pumps, fans, compressors, and conveyors in sectors like metallurgy, mining, and water supply.

• Standards compliance: IEC 60947-4-2 / GB 14048.6
• Control technology: Dual-CPU microprocessor for precise SCR control
• Voltage range: 380 V AC ±15%, 50/60 Hz ±2%
• Applicable motor type: Three-phase squirrel cage induction motor
• Power range: 7.5 kW – 500 kW
• Rated insulation voltage: 660 V
• Impulse withstand voltage: 2 kV
• Cooling method: Natural air cooling
• Protection class: IP20
• Pollution degree: 3
• Starting frequency: ≤10 times/hour (varies with load)
• Altitude derating: Reduce current by 0.5% per 100 m above 1000 m
• Temperature derating: Reduce 2% current per °C above 40°C
• Humidity: ≤95% RH (non-condensing, 20–65°C)
• Control Features: Six starting modes (Voltage ramp, Current limiting, Step voltage + current limit, Step voltage + voltage, Current ramp, Double-loop); Two stopping modes (Soft stop and free stop); Programmable delays (Start, stop, and output delay)
• Interface & Communication: LCD display (dual-language Chinese/English); Removable keypad for remote operation; Optional RS485 Modbus interface
• Outputs: Analog output (0–20 mA current signal); Relay outputs (K1 Bypass, K2 Programmable, K3 Fault – 5 A / 250 V AC)
• Protection Functions: Overload and overcurrent, input/output phase loss and imbalance, short-circuit and over-temperature, over-voltage and under-voltage, start timeout and bypass failure protection
• Mechanical & Environmental Data: Patented all-aluminum enclosure (≤75 kW); Wall or panel installation; Operating temperature: −10 °C to +40 °C; Vibration and Shock resistance: ≤0.5 g
• Model Range: Compact: NJR2-7.5D (7.5 kW) to NJR2-75D (75 kW); Medium: NJR2-90D (90 kW) to NJR2-185D (185 kW); Heavy-duty: NJR2-220D (220 kW) to NJR2-500D (500 kW)